fix开仓价卖回价与真盈亏一次冻结，复盘同步不再反复改写。

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/options/options_coin_open_lib.py

@@ -520,6 +520,14 @@ def open_coin_option_buy_full(
             message="期权持仓中",
         )
 
+        # 开仓价一次冻结:优先买币 VWAP(之后不再改);权利金币量 premium_paid 固定
+        open_px_freeze = idx_open
+        try:
+            bv = _spot_bridge.bridge_buy_vwap(conn, bridge_id)
+            if bv is not None and float(bv) > 0:
+                open_px_freeze = float(bv)
+        except Exception:
+            pass
         trade_id = _insert_coin_trade(
             conn,
             inst_id=inst_id,
@@ -537,7 +545,7 @@ def open_coin_option_buy_full(
             budget_usdt=buy_usdt,
             premium_ccy=premium_ccy,
             open_fee=open_fee,
-            open_index_px=idx_open,
+            open_index_px=open_px_freeze,
             trading_usdt_before=trading_usdt_before,
             profit_exit_enabled=profit_exit_enabled,
             profit_exit_mult=profit_exit_mult,